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Forum topic by Loveforwood posted 11-16-2018 05:24 PM 418 views 0 times favorited 6 replies Add to Favorites Watch
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Loveforwood

1 post in 26 days


11-16-2018 05:24 PM

I glued wood blocks for someone on a wall and they are all falling off. My boss had me use liquid nail and it held up fine at other projects that aren’t by the sea. Does being by the beach play a factor in them falling off?

Can anyone give suggestions on what to use to fix this wall?


6 replies so far

View John Smith's profile

John Smith

1481 posts in 362 days


#1 posted 11-16-2018 05:29 PM

which type of liquid nails did you use
what is the back board – is it painted – and what kind of paint.
I doubt very seriously that being near the beach had any affect on it.
something is going on with the bond between the wood blocks and back board.
is there any glue residue on the back of the wood blocks ??

info like that will help us help you

.

.

-- I started out with nothing in life ~ and still have most of it left.

View gwilki's profile

gwilki

226 posts in 1673 days


#2 posted 11-16-2018 06:02 PM

You are trying to glue end grain. It’s likely that whatever you are using is being sucked up into the end grain and doing you no good at all. Also, since it’s a wall, you get no benefit from gravity and you can’t clamp it. You may get good results from gel CA. Put some CA on the wall and some accelerator on the piece of wool. Press and hold for about 10 seconds and it should hold.

-- Grant Wilkinson, Ottawa ON

View Bill_Steele's profile

Bill_Steele

451 posts in 1931 days


#3 posted 11-16-2018 07:28 PM

I agree—the end grain is likely a problem—if you are using wood glue. Need a generous amount of glue.

Maybe you can add a pin nail or something close the substrate (toe nail) to hold it until the glue dries?

I find it hard to believe that proximity to the ocean is causing this—unless maybe it is extremely humid and causing the wood to swell—maybe that could break the bond—doubtful. Good luck.

View bilyo's profile

bilyo

419 posts in 1302 days


#4 posted 11-16-2018 08:13 PM

I’m surprised that the Liquid Nails didn’t hold. As stated above, most likely because of end grain. Your picture shows a lot of glue residue on the plywood substrate. You didn’t show what the glue surface on the blocks looks like. If the end grain on the blocks have glue on them, a re-glue with the same product might hold OK. Before you re-glue, however, check to see if the end grain is well coated. If not, “butter” it well with a thin coat and let dry. Then re-glue. I would keep an eye on your other projects. The same is likely to happen. I think that using a different adhesive now might have adhesion problems unless you scrape off all of the old Liquid Nails. If you do this again, you might try one of the adhesives made for paneling (not suggesting the Liquid Nails was wrong). A little experimenting might serve you well. You might also contact the Liquid Nails people to see if they have any suggestions.

View MrRon's profile

MrRon

5192 posts in 3442 days


#5 posted 11-17-2018 06:53 PM

Going by the panel, it looks like glue starvation. Being that the blocks are end grain is another reason why the glue is not holding. Applying glue or liquid nails to the sides of each block would also improve the integrity of the wall.

If I were doing a project like yours, I would glue all the blocks to a sheet of 1/4” plywood and nail into each block with a small brad (nail gun) from the back. The panel could then be glued to the wall and braced until set.

View Andre's profile

Andre

2207 posts in 2005 days


#6 posted 11-17-2018 11:28 PM

Industrial adhesive, PL200 or 400.

-- Lifting one end of the plank.

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